Hi all,
i got a question about the calculated Volume Fraction in CFX 12.0.
I am trying to simulate a free surface problem pretty similar to the flow over a bump tutorial, where there is a distinct free surface between Air and a liquid.
It works pretty well, but there is still liquid volume fraction in the air of about 10^-15. My question is, since i am pretty new in CFD, is it generally possible to get a liquid volume fraction of zero in the air region (or similar: air volume fraction in the liquid region) or is it not possible?

I wasnt able to finde an answer for that in the documentation nor in this forum.